Method of making receptacle-closures.



v G. F. JENKINS. METHOD OF MAKING BEOEPTAOLE OLOSURES.

Patented Apr. 4, 1911.

APXLIOATIOH FILED TERM, 1910.

UNITED STATES Pa rENT OFFICE.

CHARLES FRANCIS JENKINS, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO SINGLE SERVICE PACKAGE CORPORATION OF AMERICA, OF NEW YORK, N. Y., A

CORPORATION OF NEW JERSEY.

METHOD OF MAKING RECEPTACLE-CLOSURES.

Specification of Letters Patent.

Patented Apr. 4., 1911.

Application filed February 17, 1910. Serial No. 544,491.

,siding at Washington, in the District of Columbia, have invented certain new and useful Improvements in Methods of Making Receptacle-Closures, of which the following is a specification, reference being had therein to the accompanying drawing.

In many cases, it is desirable to provide paper boxes and bottles with closures or covers which project above the receptacle in such manner that they may be conveniently graspedby the hand for removal and replacement, and to have such covers externally flush or, continuous with the exterior surface of the receptacle which they close, so that a label or the like may extend smoothly over the joint and form an effectual seal. It is also often desirable that the cover should have in its top no recess in which foreign matter may collect, and further sometimes desirable that the cover should be hollow and should have an approximately plane interior surface. In making such closures of paper, it is advantageons to form the body of the cover by pressing a paper disk to cup-like'form and making its diameter approximately equal to the internal diameter of the receptacle to be closed, so that it may be inserted therein, plug-like. Practically, paper pressed to cup form will not retain its shape after it is released, and for this reason it is usual to form it while wet and subject it to high heat before it is released. This involves cost that is often prohibitory.

To secure the advantages and at the same time avoid the evils above suggested is the principalobject of this invention, and this object isattained by forming the cup above mentioned and immediately forcing it into a paper ring which becomes a. permanent part of the cover and which also serves ends other than retaining the cup in proper form, as will presently appear.

In the accompanying drawings, Figure 1 shows one above the other three parts of which the closure preferably consists. Fig. 2 shows in side elevation, partly in diametrn cal section, the upper portion of a receptacle with the novel closure in ,place. Fig. 3 illustrates, diagrammatically, one step in the process of forming the closure, the parts of thecover being shown in diametrical section. i

In these figures, A represents a paper disk pressed into cup-like form, B a paper ring to encircle the flange of the cup and project slightly above its margin, and O a plane paper disk to fit in the projectingpart of the ring and rest upon the margin of the cup with its upper face flush with the upper end face of the ring. The rings may be formed in any desired manner, for example, by dividing a suitable tube into short sections. A ring is placed directly below and in alinement with a cup-forming ring die D and a co-acting plunger E. Upon the descent of the plunger :1 suitable paper disk is pressed into cup-like form, in the usual manner and is pressed into the ring until it projects to some distance below the ring and its upper margin lies at such distance below the upper end of the ring that a disk of the desired thickness will accurately fill the space and be flush with the ring when it itself rests upon the flange of the cup. The cup being thus inserted in the ring, the latter issecnrely held against marginal expansion when both are released, and the disk C may then be added in any convenient manner, completing the closure and leaving it ready for use. I

The thickness of the ring used should be equal to the thickness of the wall of the receptacle to be closed, so that when the downwardly projecting portion of the cup is inserted, plug-like, in the receptacle, the ring forms a continuation of the receptacle upon the end of which it rests. Obviously, in cases where the cover may have a recess in its upper slde', the disk C may be omitted, although the cover in this case will have less strength.

What I claim is:

1. The method of forming closures for paper receptacles which consists in forming a short tube or ring, forming a paper cup adapted to fit closely in said ring, forming a disk adapted to fit closely within the ring, pressing the cup into the ring until its bottom portion projects from the ring and its side wall or flange lies below the latters opposite margin, and pressing the disk into the ring and against the cups margin.

2. The method of forming paper closures for paper receptacles, which consists in providing a short dry tube or ring, pressing a In testimony whereof I affix my signature dry paper disk into cup form and presslng in presence of two Witnesses.

it into said rin until its margin 'is below 1 the plane of the rings upper margin and its CHARLES FRANCIS JENKINS bottom projects from the ring, and pressing Vitnesses:

a closely fitting paper disk into the ring JAMES L. CRAWFORD,

above the cup. R. CRAIG GREENE. 

